<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ORM\Id;

use Doctrine\ORM\EntityManager;
use Doctrine\ORM\ORMException;

/**
 * Special generator for application-assigned identifiers (doesnt really generate anything).
 *
 * @since   2.0
 * @author  Benjamin Eberlei <kontakt@beberlei.de>
 * @author  Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author  Jonathan Wage <jonwage@gmail.com>
 * @author  Roman Borschel <roman@code-factory.org>
 */
class AssignedGenerator extends AbstractIdGenerator {
	/**
	 * Returns the identifier assigned to the given entity.
	 *
	 * @param object $entity
	 * @return mixed
	 * @override
	 */
	public function generate(EntityManager $em, $entity) {
		$class = $em->getClassMetadata( get_class( $entity ) );
		$identifier = array();
		if( $class->isIdentifierComposite ) {
			$idFields = $class->getIdentifierFieldNames();
			foreach( $idFields as $idField ) {
				$value = $class->getReflectionProperty( $idField )->getValue( $entity );
				if( isset( $value ) ) {
					$identifier[$idField] = $value;
				} else {
					throw ORMException::entityMissingAssignedId( $entity );
				}
			}
		} else {
			$idField = $class->identifier[0];
			$value = $class->reflFields[$idField]->getValue( $entity );
			if( isset( $value ) ) {
				$identifier[$idField] = $value;
			} else {
				throw ORMException::entityMissingAssignedId( $entity );
			}
		}
		
		return $identifier;
	}
}